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<div class="subTitle">org.apache.commons.lang3.builder</div>
<h2 title="Interface Diffable" class="title">Interface Diffable&lt;T&gt;</h2>
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<dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - the type of objects that this object may be differentiated against</dd></dl>
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<pre>public interface <span class="strong">Diffable&lt;T&gt;</span></pre>
<div class="block"><p><code>Diffable</code> classes can be compared with other objects
 for differences. The <a href="../../../../../org/apache/commons/lang3/builder/DiffResult.html" title="class in org.apache.commons.lang3.builder"><code>DiffResult</code></a> object retrieved can be queried
 for a list of differences or printed using the <a href="../../../../../org/apache/commons/lang3/builder/DiffResult.html#toString()"><code>DiffResult.toString()</code></a>.</p>
 
 <p>The calculation of the differences is <i>consistent with equals</i> if
 and only if <code>d1.equals(d2)</code> implies <code>d1.diff(d2) == ""</code>.
 It is strongly recommended that implementations are consistent with equals
 to avoid confusion. Note that <code>null</code> is not an instance of any class
 and <code>d1.diff(null)</code> should throw a <code>NullPointerException</code>.</p>
 
 <p>
 <code>Diffable</code> classes lend themselves well to unit testing, in which a
 easily readable description of the differences between an anticipated result and
 an actual result can be retrieved. For example:
 </p>
 <pre>
 Assert.assertEquals(expected.diff(result), expected, result);
 </pre></div>
<dl><dt><span class="strong">Since:</span></dt>
  <dd>3.3</dd>
<dt><span class="strong">Version:</span></dt>
  <dd>$Id: Diffable.java 1561225 2014-01-24 23:17:29Z djones $</dd></dl>
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<td class="colFirst"><code><a href="../../../../../org/apache/commons/lang3/builder/DiffResult.html" title="class in org.apache.commons.lang3.builder">DiffResult</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/lang3/builder/Diffable.html#diff(T)">diff</a></strong>(<a href="../../../../../org/apache/commons/lang3/builder/Diffable.html" title="type parameter in Diffable">T</a>&nbsp;obj)</code>
<div class="block">Retrieves a list of the differences between
 this object and the supplied object.</div>
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<h4>diff</h4>
<pre><a href="../../../../../org/apache/commons/lang3/builder/DiffResult.html" title="class in org.apache.commons.lang3.builder">DiffResult</a>&nbsp;diff(<a href="../../../../../org/apache/commons/lang3/builder/Diffable.html" title="type parameter in Diffable">T</a>&nbsp;obj)</pre>
<div class="block"><p>Retrieves a list of the differences between
 this object and the supplied object.</p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>obj</code> - the object to diff against, can be <code>null</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>a list of differences</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the specified object is <code>null</code></dd></dl>
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